Age distribution of reported dengue cases and 2019 seroprevalence estimates by age group for each US state and territory assessed.

Age distribution of all locally reported, confirmed and probable dengue cases in Puerto Rico (PR, A), American Samoa (AS, B) and US Virgin Islands (USVI, C) in 2010–2019 (colored bar) and age distribution of the population in these respective territories (grey bars, 2010 census) (left panel) and age distribution of 2019 seroprevalence estimate obtained from the fit of model S (reported cases are secondary infections only), with corresponding 95% credible intervals (shaded area, right panel). Detailed tables on years with reported dengue cases are available in S1 Document. Y-axis scale on the left panels differ for each location. Base layers for Puerto Rico were retrieved from the US Census Bureau TIGER/Line files [56]. American Samoa and US Virgin Islands shapefiles were obtained from GADM (https://gadm.org/). Terms and conditions of use available from https://gadm.org/license.html.